adjective
- beyond doubt or criticism; completely reliable and trustworthy
Examples
- The witness had an unimpeachable reputation for honesty.
- Her credentials were unimpeachable, making her the perfect candidate.
- The evidence against him was unimpeachable.
- He cited unimpeachable sources for his research.
- The judge’s integrity was considered unimpeachable.
- She provided unimpeachable proof of her claims.